IP (Internet Protocol), the way computers
talk on the internet, defines an addressing scheme so that every
device attached to a network can be uniquely identified and
contacted.
IPv4 (IP Version 4), which is what we are currently using,
allocates 32 bits for addresses. Hence there are up to 232
= 4,294,967,296 addresses. 4 billion addresses for computers,
etc.
However, we are running
out of IP addresses. The next version of IP, version 6,
allocates 128-bits for identifying each network device. That
is, there will be 2128 = 3.4 x 1038 =
340,000,000,000,000,000,000,000,000,000,000,000,000 addresses.
There are 7.5 x 1018grains
of sand in all the worlds beaches.
There are 1028 atoms in your body.
IPv6 will give us 3.4 x 1038 addresses for computers,
etc.
Campus networking
levies fees from UNC departments not by headcount, but by telephone-count.
This is deemed to better represent the actual network usage
than the number of employees of a department.
Pi (value of 3.14...)
is graphically derived as follows:
(1) Draw a Circle.
(2) Measure the length around the circle.
(3) Measure the length across the circle.
(4) Divide the first number by the second and you arrive at
pi .
No matter who you are, what language you speak, where you live
on Earth, what base you use (binary, hexadecimal, decimal),
you still arrive at the same value of pi. No matter where
you live in the universe (human, alien), or what time period
(alongside dinosaurs, before Christ, today, or in a million
years) it will still be the same. It is built into the fabric
of the universe. See the last page of
Contact the book...